A Databox driver to stream data from twitter

This is work in progress.

overwrite twitter-secrets.json with the consumer_key and consumer_secret. When running within the databox OAuth is then used to finally authenticate the user with twitter. This is accessed by visiting /ui/databox-driver-twitter-stream/.

This driver writes twitter event data into a databox-store-blob for later processing.

It saves the following streams of data:

1. twitterUserTimeLine - the logged in users timeline
2. twitterHashTagStream - tweets that contain #raspberrypi, #mozfest, #databox, #iot and #NobelPrize
3. twitterDirectMessage - a list of the users' direct messages 
4. twittrRetweet - a list of the users' retweets 
5. twitterFavorite - a list of the users favourited

These can then be accessed databox-store-blob API.